/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.catalina.mbeans;

import javax.management.MBeanException;
import javax.management.MBeanServer;
import javax.management.RuntimeOperationsException;

import org.apache.catalina.Valve;
import org.apache.catalina.core.StandardHost;
import org.apache.tomcat.util.modeler.BaseModelMBean;
import org.apache.tomcat.util.modeler.ManagedBean;
import org.apache.tomcat.util.modeler.Registry;

/**
 * <p>
 * A <strong>ModelMBean</strong> implementation for the
 * <code>org.apache.catalina.core.StandardHost</code> component.
 * </p>
 * 
 * @author Amy Roh
 * @version $Revision: 467222 $ $Date: 2006-10-24 11:17:11 +0800 (星期二, 24 十月
 *          2006) $
 */

public class StandardHostMBean extends BaseModelMBean {

	/**
	 * The <code>MBeanServer</code> for this application.
	 */
	private static MBeanServer mserver = MBeanUtils.createServer();

	// ----------------------------------------------------------- Constructors

	/**
	 * Construct a <code>ModelMBean</code> with default
	 * <code>ModelMBeanInfo</code> information.
	 * 
	 * @exception MBeanException
	 *                if the initializer of an object throws an exception
	 * @exception RuntimeOperationsException
	 *                if an IllegalArgumentException occurs
	 */
	public StandardHostMBean() throws MBeanException,
			RuntimeOperationsException {

		super();

	}

	// ------------------------------------------------------------- Attributes

	// ------------------------------------------------------------- Operations

	/**
	 * Add an alias name that should be mapped to this Host
	 * 
	 * @param alias
	 *            The alias to be added
	 * 
	 * @exception Exception
	 *                if an MBean cannot be created or registered
	 */
	public void addAlias(String alias) throws Exception {

		StandardHost host = (StandardHost) this.resource;
		host.addAlias(alias);

	}

	/**
	 * Return the set of alias names for this Host
	 * 
	 * @exception Exception
	 *                if an MBean cannot be created or registered
	 */
	public String[] findAliases() throws Exception {

		StandardHost host = (StandardHost) this.resource;
		return host.findAliases();

	}

	/**
	 * Return the MBean Names of the Valves assoicated with this Host
	 * 
	 * @exception Exception
	 *                if an MBean cannot be created or registered
	 */
	public String[] getValves() throws Exception {

		Registry registry = MBeanUtils.createRegistry();
		StandardHost host = (StandardHost) this.resource;
		String mname = MBeanUtils.createManagedName(host);
		ManagedBean managed = registry.findManagedBean(mname);
		String domain = null;
		if (managed != null) {
			domain = managed.getDomain();
		}
		if (domain == null)
			domain = mserver.getDefaultDomain();
		Valve[] valves = host.getValves();
		String[] mbeanNames = new String[valves.length];
		for (int i = 0; i < valves.length; i++) {
			mbeanNames[i] = MBeanUtils.createObjectName(domain, valves[i])
					.toString();
		}

		return mbeanNames;

	}

	/**
	 * Return the specified alias name from the aliases for this Host
	 * 
	 * @param alias
	 *            Alias name to be removed
	 * 
	 * @exception Exception
	 *                if an MBean cannot be created or registered
	 */
	public void removeAlias(String alias) throws Exception {

		StandardHost host = (StandardHost) this.resource;
		host.removeAlias(alias);

	}

}
